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usb: chipidea: tegra: Add runtime PM and OPP support

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The Tegra USB controller belongs to the core power domain and we're going
to enable GENPD support for the core domain. Now USB controller must be
resumed using runtime PM API in order to initialize the USB power state.
We already support runtime PM for the CI device, but CI's PM is separated
from the RPM managed by tegra-usb driver. Add runtime PM and OPP support
to the driver.

Acked-by: Peter Chen <peter.chen@kernel.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Dmitry Osipenko 2021-12-01 02:23:26 +03:00 committed by Thierry Reding
parent c132bc881f
commit 8b85e11c1a
1 changed files with 46 additions and 7 deletions
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53
drivers/usb/chipidea/ci_hdrc_tegra.c
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@ -7,6 +7,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/usb.h>
@ -15,6 +16,8 @@
#include <linux/usb/of.h>
#include <linux/usb/phy.h>
#include <soc/tegra/common.h>
#include "../host/ehci.h"
#include "ci.h"
@ -278,6 +281,8 @@ static int tegra_usb_probe(struct platform_device *pdev)
if (!usb)
return -ENOMEM;
platform_set_drvdata(pdev, usb);
soc = of_device_get_match_data(&pdev->dev);
if (!soc) {
dev_err(&pdev->dev, "failed to match OF data\n");
@ -296,11 +301,14 @@ static int tegra_usb_probe(struct platform_device *pdev)
return err;
}
err = clk_prepare_enable(usb->clk);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable clock: %d\n", err);
err = devm_tegra_core_dev_init_opp_table_common(&pdev->dev);
if (err)
return err;
pm_runtime_enable(&pdev->dev);
err = pm_runtime_resume_and_get(&pdev->dev);
if (err)
return err;
}
if (device_property_present(&pdev->dev, "nvidia,needs-double-reset"))
usb->needs_double_reset = true;
@ -320,8 +328,6 @@ static int tegra_usb_probe(struct platform_device *pdev)
if (err)
goto fail_power_off;
platform_set_drvdata(pdev, usb);
/* setup and register ChipIdea HDRC device */
usb->soc = soc;
usb->data.name = "tegra-usb";
@ -350,7 +356,9 @@ static int tegra_usb_probe(struct platform_device *pdev)
phy_shutdown:
usb_phy_shutdown(usb->phy);
fail_power_off:
clk_disable_unprepare(usb->clk);
pm_runtime_put_sync_suspend(&pdev->dev);
pm_runtime_force_suspend(&pdev->dev);
return err;
}
@ -360,15 +368,46 @@ static int tegra_usb_remove(struct platform_device *pdev)
ci_hdrc_remove_device(usb->dev);
usb_phy_shutdown(usb->phy);
pm_runtime_put_sync_suspend(&pdev->dev);
pm_runtime_force_suspend(&pdev->dev);
return 0;
}
static int __maybe_unused tegra_usb_runtime_resume(struct device *dev)
{
struct tegra_usb *usb = dev_get_drvdata(dev);
int err;
err = clk_prepare_enable(usb->clk);
if (err < 0) {
dev_err(dev, "failed to enable clock: %d\n", err);
return err;
}
return 0;
}
static int __maybe_unused tegra_usb_runtime_suspend(struct device *dev)
{
struct tegra_usb *usb = dev_get_drvdata(dev);
clk_disable_unprepare(usb->clk);
return 0;
}
static const struct dev_pm_ops tegra_usb_pm = {
SET_RUNTIME_PM_OPS(tegra_usb_runtime_suspend, tegra_usb_runtime_resume,
NULL)
};
static struct platform_driver tegra_usb_driver = {
.driver = {
.name = "tegra-usb",
.of_match_table = tegra_usb_of_match,
.pm = &tegra_usb_pm,
},
.probe = tegra_usb_probe,
.remove = tegra_usb_remove,